Thermostat



J. BROMBACHER.

THERMOSTAT.

APPLICATION FILED mm, 1919.

1 ,329,650. Patented Feb. 3, 1920.

UNITED STATES PATENT OFFICE.

JULIUS BROMBACHER, LOS ANGELES, CALIFORNIA.

THEBMOSTAT.

Application filed April 2, 1919. Serial No. 287,064.

- with a water heater, objects of this invention being to provide a simple, easily accessible and adjustable arrangement. in which the action of the thermostatic lever is steadily held normal, and deflection from the normal position positively prevented; in which the bearing points are securely protected against the water dripping from the heater, and consequently are insured against rust, which would impair the action of the lever; in which the valve stem cooperates in maintaining the lever in normal position, and in which the lever itself maintains a constant and unvarying pressure on the thermostatic element.

These and other objects are attained by the device specially described hereinafter in connection with the accompanying drawing, in which Figure 1 is a sectional view showing the arrangement of the parts when the thermostatic element is under the influence of heat and the valve is closed; and Fig. 2 is an end view.

Particularly referring to the drawing, my invention comprises a chamber 1, formed with a valve seat 2, for a valve 3, the stem 4 of which extends through and is guided by a boss 5. The chamber 1 has a passageway 6 through which the gas is conducted to a tip or other means 7, and into a mixing chamber 8, supported in any suitable manner upon the chamber. Onto the chamber 1 is bolted or otherwise secured a fitting 9 having a recess 10 for accommodating a spiral spring 11, the apex 11 of which is pointed and exerts tension on the center of the valve stem 4. This fitting 9 is formed with a central passageway 12, for gas, the

flow of which is controlled by a frusto-conical valve 13, and with a gas inlet 14:, from which latter rises a vertical pipe 15 for using a portion of the gas for the pilot burner 15', such portion controllable by a f Specification of Letters Patent. 7

Patented Feb.3,v 1920.

valve 16, operating in said gas outlet 14.

The aforesaid frusto-conical valve 13 isheld in its seat by a member 17, and'is provided .with a squared extension 18, for accommodation of an operating lever 19, that is held against removal by an arm 20, preferably formed integral with said mixing chambers.

Bolted or otherwise fastened to the chamber 1., is a vertically disposed elbow 20, in the vertical branch of which is secured a water circulating pipe 21, andin the lower horizontal wall of which is securely fastened an element, as a tube 22, which may expand and contract under the influence of hot and cold water, respectively, traveling through pipe 21 in which said tube is freely disposed.

,The top of said element is closed by a cap 23, which serves asa thrustbearing for a rod 2 1. of any suitable material, which is provided at one end with a stem 25. On the underside, the elbow 20 is provided with two spaced supports 26, in the ends of which is adjustably carried a plurality of fulcrum pins or screws 27. Between said supports 26 extends a lever 28, having two lugs or trunnions 29, by means of which the lever 28 is arranged to tilt or operate under the pressure of the rod 24, the stem 25 of which is in engagement with the shorter end 30 0f the lever 28, and the longer end 31 of which is formed or provided with a weight 32, whereby contact of the end 30 of the lever is additionally insured and maintained at all times. The said weight 32 of the lever is provided with a socket 33, into which ex tends the stem 4 of the valve 3, and which stemholds the weighted end of the lever 28 against lateral and longitudinal movement or displacement, while the other end is held against lateral displacement or movementby a plurality of downwardly extending lips 34, which engage against the pins 27.

In the position shown in Fig. 1, it willbe seen that the thermostatic tube is in expanded condition, assuming that the water is heated to the extent required, and that the flow of the gas is cut off automatically until the temperature of the water in the'pipe. 21 causes a contraction of the thermostatic tube 22, when a reversal of the sequence of op eration hereinbefore stated takes place. I

Due to the fact that the apex 11' of the spring 11 is centralized on the stem 4 of the valve 3, an even operation of the Valve results, making the action positive.

hat I claim, is y l. A gas regulator comprising a chamber, a valve therein having a stem extending therethrough, a fitting secured to said chamber, and provided with a'plurality of downwardly extending supports, a plurality of adjustable bearings in said supports, a lever having trunnions resting upon said bearings, and having a weighted end provided with a socket for the end of said valve stem, and a thermostatically controlled means in said fitting and bearing against the shorter end of and for operating said lever.

2. A gas regulator comprising a chamber, a valve therein having a stem extending therethrough, a spiral spring having a pointed apex centrally engaging the stem, a fitting secured to said chamber for water circulating pipes, a thermostatic means in c said fitting, said fitting formed on the loottom with spaced supports, adjustable bearings in said supports, and a lever having trunnions resting upon said bearings, and its shorter end in operative engagement wlth said thermostatic means, the longer end of said lever provided with a weight in operative engagement with said valve stem.

shorter end ofsaid lever being in operative contact with said thermostatic means, and

-the longer end provided with a Weight with which said valve stem is normally in contact. I

In testimony whereof I afiix my signature in the presence of two witnesses.

JULIUS BROMBAOHER.

Witnesses FRANK NEWNHAM, H. M. BARSTOYV. 

